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Storage & Clustering Community Blog
Showing posts tagged with Basics
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Douglas_A | 06 Mar 2009 | 0 comments

This document is not listed on the IBM web site so i have attached it here (hope the mods will let it stay)

It details the LTO drive status codes and there true meaning. We all have seen the Media errors from Netbackup, backupexec, and so forth. This document details what you see from the web gui of a 3500 series tape library or maybe you have another gui accessing this information. Either way i hope you get some good use out of it. I know i have.

Eileen | 28 Feb 2009 | 0 comments

Welcome to the new Symantec Connect and specifically to the Clustering and Replication Community. What a great opportunity to really build a vibrant and engaging community all about high availability and disaster recovery!

Now to introduce myself, I’m Eileen Allan, the new Clustering and Replication Community Manager. I’ll be managing and moderating the content for this area of Symantec Connect. Please feel free to drop me a note with your thoughts, ideas or suggestions. I’d be interested to learn what kind of information is important to you. What topics are of interest, or what problems are you trying to solve . . and by all means, let me know what you think of the new site.

Everyone is invited to participate and share technical knowledge and experience with the community. Take a few minutes to start a forum discussion or ask a question. Your expertise can help someone else in the community solve a problem. Why not write an article or a blog...

Eric.Hennessey | 27 Jun 2008 | 0 comments

Author’s Note:  It’s come to our attention that while this is primarily a technical blog geared towards current users of Veritas Cluster Server (VCS), there are some readers of this blog with little background in clustering for availability.  So with that in mind, we begin a series of posts which we hope will provide some foundation knowledge for those aspiring to HA Gurudom.

Nod if any of this sounds familiar …

Your company demands IT services that pretty much never go down. After all, business availability and IT service availability are inextricably linked today.

But things happen. Like hardware failures. Power outages. Upgrades. Patches. Shrinking budgets. And other natural and man-made disasters. Your basic Career Limiting Event™ when the revenue generating or customer facing application goes down.

Given such an environment, is it even possible to achieve application dial tone and the like?


Ameya | 02 Apr 2007 | 0 comments

The Dynamic Multi Path (DMP) capability was first introduced in Volume Manager 2.5.7 release primarily to support A/A multi path arrays from Sun Microsystems. In those days, the early version of arrays had SCSI connections with fat and thick cables running from host to the array directly. Unlike the present day modern arrays, there was no concept of fabric switches, and no fiber channel (FC) technology enabled on the arrays. The first DMP could do only multi path operations such as load balancing using balanced path I/O policy, path failures and restoration by using SCSI inquiry commands. Since the number of devices were handful, the error processing and restore processing were all single threaded tasks. Further, as the number of supported arrays was small, the entire device discovery and reconfiguration was closely tied to the parent operating system.

The next major enhancements of DMP were introduced in Volume Manager 3.1.1 release that had support to co-exist with...